Incredibly sad, totally unbelievable reasoning. Dude clearly should not be allowed to have a firearm.
In a crowded place, a long rifle is the WORST gun to have. The reason he got tackled was likely because he couldnt swing the barrel towards the tackler fast enough.
Wrestling a rifle away from someone is a lot easier than wrestling away a pistol. Lets hope that mass shooters keep using cool looking rifles, as opposed to pistols.